PM2.5, particulate matter(细颗粒物)less than 2.5 micrometers in size, which can penetrate deep into the lungs, is considered ___ a reflection of air quality. A. being B. to be C. to have been D. having been 相关知识点: 试题来源...
Virus concentrations were negatively correlated with relative and absolute humidity (RH and AH) for particles between 1.0-2.5 micrometers only. Modeling of virus concentrations indoors suggests a source strength of 140,000 +/- 100,000 genome copies per cubic meter per hour and a deposition flux ...
The global Internet of Things (IoT) market size was valued at USD 595.73 billion in 2023. The market is projected to grow from USD 714.48 billion in 2024 to USD 4,062.34 billion by 2032, exhibiting a CAGR of 24.3% during the forecast period. The Internet of Things refers to the network...
Size dependence of the yield strength of fcc and bcc metallic micropillars with diameters of a few micrometers. Philos. Mag. 92, 1238-1260.S.W. Lee, W.D. Nix, Size dependence of the yield strength of fcc and bcc metallic micropillars with diameters of a few micrometers, Philos. Mag....
Field-Flow Fractionation: A Versatile Technology for Particle Characterization in the Size Range 10 Field-flow fractionation: A versatile technology for particle characterization in the size range 10-3 to 102 micrometers. KONA Powder Part. J. 1991, 9, 200-217. [CrossRef]Giddings JC, Ratanathana...
Individual nanofibers form- ing the hydrogel network were determined to be 6.3 6 1.0 nm in diameter and several tens of micrometers in length by TEM. Nevertheless, few bundles of nanofibers, in the range of 10.6– 28.3 nm in diameter, were also observed. SEM images showed that the drying ...
The global cyber security market size was estimated at USD 222.66 billion in 2023 and is projected to grow at a compound annual growth rate (CAGR) of 12.3% from 2023 to 2030. A growing number of cyber-attacks owing to the proliferation of e-commerce platforms, emergence of smart devices, ...
Apparatus for dispensing a controlled mass of a powder with an average particle size of less than about 200 micrometers: a powder bed with a predetermined mass and uniform height; a grille plate with an array of holes; tubes inserted through a hole of the grille plate into the powder bed...
Instead of Chla, total phytoplankton carbon biomass (C, in mg m−3) is the parameter more directly related to the carbon cycle, biogeochemical cycles, and climate [7,8]. Accurate estimation of C provides a means to observe the standing stocks of phytoplankton and their response to ...
This paper designs a compact plasmonic pressure sensor composed of a MIM bus WG and a resonator, including a horizontal slot and several stubs. The resonator’s size of the designed sensor is as small as a few hundred nanometers. We employed the finite element method (FEM) to investigate th...